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Researchers have demonstrated that intentionally introducing loss into photonic crystal defects can drive quality factors above 10,000 by leveraging topological branch-cut singularities. This counterintuitive mechanism, rooted in non-Hermitian physics, offers a novel pathway for engineering high-gain photonic devices that surpass conventional design limits. The findings provide a theoretical framework for optimizing light manipulation and signal processing through deliberate structural defects rather than minimizing dissipation.

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Loss-Driven Gain Hits Q-Factors Above 10,000 in Photonic Crystals

Quantum ZeitgeistMay 26, 20262 min read

Researchers demonstrated loss-driven gain in defects within photonic crystals, achieving exceptionally high-quality factors exceeding 10,000.

Researchers at the University of California, Los Angeles have achieved quality factors exceeding 10,000 in photonic crystals by intentionally introducing loss, a surprising result given that gain is typically maximized by minimizing dissipation. Daniel Cui and Aaswath P. Raman…

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